Convert bitfields to bool in SelectorChecker.

Source/core/css/SelectorChecker.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 63 matching lines @@
 
         const CSSSelector* selector;
         RawPtrWillBeMember<Element> element;
         RawPtrWillBeMember<Element> previousElement;
         RawPtrWillBeMember<const ContainerNode> scope;
         VisitedMatchType visitedMatchType;
         PseudoId pseudoId;
         ComputedStyle* elementStyle;
         RawPtrWillBeMember<LayoutScrollbar> scrollbar;
         ScrollbarPart scrollbarPart;
-        unsigned isSubSelector : 1;
-        unsigned hasScrollbarPseudo : 1;
-        unsigned hasSelectionPseudo : 1;
-        unsigned isUARule : 1;
-        unsigned scopeContainsLastMatchedElement : 1;
-        unsigned treatShadowHostAsNormalScope : 1;
+        bool isSubSelector;
+        bool hasScrollbarPseudo;
+        bool hasSelectionPseudo;
+        bool isUARule;
+        bool scopeContainsLastMatchedElement;
+        bool treatShadowHostAsNormalScope;
     };
 
     struct MatchResult {
         MatchResult()
             : dynamicPseudo(NOPSEUDO)
             , specificity(0) { }
 
         PseudoId dynamicPseudo;
         unsigned specificity;
     };
@@ skipping 63 matching lines @@
 }
 
 inline bool SelectorChecker::isHostInItsShadowTree(const Element& element, const ContainerNode* scope)
 {
     return scope && scope->isInShadowTree() && scope->shadowHost() == element;
 }
 
 }
 
 #endif